JPS5486417A - Hot iron desulfurizing agent and production thereof - Google Patents
Hot iron desulfurizing agent and production thereofInfo
- Publication number
- JPS5486417A JPS5486417A JP15429777A JP15429777A JPS5486417A JP S5486417 A JPS5486417 A JP S5486417A JP 15429777 A JP15429777 A JP 15429777A JP 15429777 A JP15429777 A JP 15429777A JP S5486417 A JPS5486417 A JP S5486417A
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- hot iron
- outer layer
- caco3
- agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
PURPOSE:To cheaply attain desulfurization efficiency of the title agent equal to that of CaC2 by blasting the outer layer consisting of CaO fine crystals and carbon with the inner layer consisting of CaCO3 and carbon to powder the outer layer and disperse the powder in hot iron when the agent is added to the hot iron. CONSTITUTION:The inner layer consists of CaCO3 fine crystals and carbon of below 1 mu in diameter present among the crystals, and carbon-contg. CaCO3 particles of below 5 mu in diameter cohere to constitute the layer. The outer layer consists of CaO fine crystals and carbon of below 1 mu in diameter present among the crystals, and carbon-contg. quick lime particles of below 5 mu in diameter cohere. The amt. of CaCO3 in the inner layer is 0.5-30 pts. wt. to 100 pts. wt. of the outer layer. When this desulfurizing agent of double structure is added to hot iron, the inner layer is thermally decomposed to stir the hot iron, and at the same time, the desulfurizing compsn. of the outer layer is powdered and dispersed in the hot iron. Thus, the reaction efficiency of the agent can be increased remarkably.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15429777A JPS5486417A (en) | 1977-12-23 | 1977-12-23 | Hot iron desulfurizing agent and production thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15429777A JPS5486417A (en) | 1977-12-23 | 1977-12-23 | Hot iron desulfurizing agent and production thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5486417A true JPS5486417A (en) | 1979-07-10 |
Family
ID=15581045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15429777A Pending JPS5486417A (en) | 1977-12-23 | 1977-12-23 | Hot iron desulfurizing agent and production thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5486417A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3212210A1 (en) * | 1981-04-09 | 1982-11-04 | Nippon Carbide Kogyo K.K., Tokyo | Process for the calcination of diamide lime and device suitable therefor |
JP2008031538A (en) * | 2006-07-31 | 2008-02-14 | Jfe Mineral Co Ltd | METHOD FOR MANUFACTURING CaO-BASED DESULFURIZING AGENT |
JP2008031537A (en) * | 2006-07-31 | 2008-02-14 | Jfe Steel Kk | CaO-BASED DESULFURIZING AGENT AND METHOD FOR DESULFURIZING MOLTEN IRON |
WO2009146573A1 (en) * | 2008-06-02 | 2009-12-10 | 鞍钢股份有限公司 | A composite ball used to precisely control the quantity of the trace element dissolved in the molten steel and the method of producing the composite ball |
-
1977
- 1977-12-23 JP JP15429777A patent/JPS5486417A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3212210A1 (en) * | 1981-04-09 | 1982-11-04 | Nippon Carbide Kogyo K.K., Tokyo | Process for the calcination of diamide lime and device suitable therefor |
JP2008031538A (en) * | 2006-07-31 | 2008-02-14 | Jfe Mineral Co Ltd | METHOD FOR MANUFACTURING CaO-BASED DESULFURIZING AGENT |
JP2008031537A (en) * | 2006-07-31 | 2008-02-14 | Jfe Steel Kk | CaO-BASED DESULFURIZING AGENT AND METHOD FOR DESULFURIZING MOLTEN IRON |
WO2009146573A1 (en) * | 2008-06-02 | 2009-12-10 | 鞍钢股份有限公司 | A composite ball used to precisely control the quantity of the trace element dissolved in the molten steel and the method of producing the composite ball |
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